/*
 * Copyright 2014 Netflix, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package com.netflix.spinnaker.gate.model.discovery
import com.fasterxml.jackson.annotation.JsonProperty
import com.fasterxml.jackson.annotation.JsonRootName
import groovy.transform.EqualsAndHashCode

import java.util.concurrent.ThreadLocalRandom

@JsonRootName("application")
@EqualsAndHashCode
class DiscoveryApplication {

  static DiscoveryInstance getRandomUpInstance(List<DiscoveryApplication> apps) {
    List<DiscoveryInstance> candidates = apps.collect { it.instances.findAll { it.status == 'UP' && it.port.enabled } }.flatten()
    if (!candidates) {
      return null
    }
    candidates[ThreadLocalRandom.current().nextInt(candidates.size())]
  }

  String name

  @JsonProperty('instance')
  List<DiscoveryInstance> instances
}

